Fluid Mechanicsthe problem says: Water flows from a bathtub through a 2.5 diameter plastic pipe to a large air-filled drain...etc Here, i need to know what is the pressure at the air-filled drain? Is it equal to the atmospheric pressure? Thanks in advance.
December 21, 2014

Fluid MechanicsI have a question in fluid mechanics...and i need to know the pressure in an air-filled drain? Is it the atmospheric pressure? Thanks in advance
December 21, 2014

physicsR=sqrt(3^2 + 4^2) =sqrt(9+16) =sqrt(25) =5 N. the two vertical and horizontal forces are basically components of the resultant. Good luck in your studies!
December 21, 2014

physicalBaseball of 0.15 kg is thrown upward at an initial velocity of 35 m/s. tow second later a 20 g bullet is fired at 250 m/s into the rising baseball . how high will the combined bullet and baseball rise.
December 6, 2014

English CompositionYour boss has asked you to investigate the types and uses of social media that might be appropriate in the workplace. In addition, you are also asked to compare and contrast the services and provide a recommendation that would be suitable to your companys goals. ...
October 8, 2014

Grammar - INTERJECTIONHo, ho! That was a good joke. Good heavens! You won the first price. Oh dear! You should not done that Bravo! You have won the prize. have you spent all your pocket money? Tut-tut! Did you break the cup. Hush! The king is going to speak
May 12, 2014

grammar Is this sentence is correct? He wanted to polish his shoes, for it were covered with mud. or else replace it with they.
April 29, 2014

Mathsoybean mean is 16% protein and corn mean is 9% protein. how many pounds of each should be mixed to get a 350 pound mixture that is 13% protein?
April 22, 2014

grammar - conjanction Choose the following words to combine these sentence. words: after and till because as but for if when since so though unless until while or 1) The children went home. It was getting dark. 2) The boys were allowed to read books. The teacher was absent. 3) Mother told us not to...
April 8, 2014

Grammar1) Because 2) For 3) As 4) Till 5) when 6) but 7) So 8) But 9) If 10) While Correct the mistakes and re-post it.
April 3, 2014

GrammarFill in the blanks with the chosen words. words: after and till because as but for if when since so though unless until while or 1) The children went home. It was getting dark. 2) The boys were allowed to read books. The teacher was absent. 3) Mother told us not to eat. It was...
April 3, 2014

engineering (logic systems design)Two flip-flops are connected as shown below. The delay represents wiring delay between the two clock inputs, which results in clock skew. This can cause possible loss of synchronization. The flip-flop propagation delay from clock to Q is 10 ns < tp < 15 ns, the set-up ...
October 3, 2013

mathPROCESSING CLAIMS. Joe takes x hours on the average to process a claim. whereas Ellen's average is 1 hour longer. a) write a rational function C(x) that gives the number of claims that they process while working for an 8-hour shift. b) Find C(c)
April 5, 2013

mathA pair of ordinary jeans at A-Mart costs $50 less than a pair of designer jeans at Enrico's. In fact, you can buy four pairs of A-Mart jeans for less than one pair of Enrico's jeans. What is the price range for a pair of A-Mart jeans?
January 29, 2013

Math-StatJane and Bob are on the same game show. They answer one question, either True or False. The probability that Bob is correct is 70%. The probability that Jane is correct is also 70%. Moreover, the probability that Bob is correct given Jane is either correct or incorrect is ...
January 29, 2013

mathInvesting inhertance.Norman invested one-half of his inheritance in a CD that had a 10% annoul yield. He lent one-quarter of of his inheritance to his brother -in-law at 12% simple interest. His income from these two investments was $6400 for 1 year. How much was the inheritance?
January 29, 2013

physicsA mass m = 17.0 kg is pulled along a horizontal floor with NO friction for a distance d =5.1 m. Then the mass is pulled up an incline that makes an angle è = 30.0° with the horizontal and has a coefficient of kinetic friction ìk = 0.34. The entire time the ...
October 18, 2012

PhysicsA woman weighing 500 N stands in an elevator that is traveling upward. At a given instant the speed of the elevator as well as the women is 10m/s and both are decreasing at a rate of 2 m/s2 at that instant the elevator is exerts a force on the woman that is
September 4, 2012

Chemistry1. An aqueous solution contains 0.154 M ascorbic acid (H2C6H6O6) and 0.196 M hydrobromic acid. Calculate the ascorbate (C6H6O62-) ion concentration in this solution. Can you explain how to do this please? thank you. Also if you can is number 2 missing information or am I ...
April 26, 2012

ChemistryWhat volume of hydrogen sulfide is required to produce 161 liters of sulfur dioxide according to the following reaction? (All gases are at the same temperature and pressure.) hydrogen sulfide (g) + oxygen (g)----> water (l) + sulfur dioxide (g)
April 25, 2012

ChemistryHow many moles of hydrogen gas are required to react completely with 807 L of ethylene (C2H4) according to the following reaction at 0oC and 1 atm? hydrogen (g) + ethylene (C2H4) (g)---> ethane (C2H6) (g) Should I use the ideal gas law here?
April 25, 2012

ChemistryDon't you have to divide moles of calcium carbonate by 2 to get moles of carbon dioxide? and then multiply by 0.0821 and 273 and then divide by 1?
April 25, 2012

ChemistryWhat volume of carbon dioxide is produced when 0.979 mol of calcium carbonate reacts completely according to the following reaction at 0oC and 1 atm? calcium carbonate (s)---> calcium oxide (s) + carbon dioxide (g) Should I use the ideal gas law?
April 25, 2012

ChemistryWhat is the pH of 1.0M Na2SO3 (aq)solution at 25C? a) 3.40 b) 6.03 c) 10.60 d) 7.96 e) 10.40 How can I get ph from only the Molarity?
April 3, 2012

ChemistryWhat is the equilibrium constant for the reaction of ammonium ion with formate ion? I know that the ionization constant for ammonium ion is Ka=5.6e-10 and for formate Kb=5.6e-11. a) 1.0 X 10-13 b) 5.6 X 10-11 c) 3.1 X 10-6 d) 1.8 X 10-5 e) 3.2 X 105 I dont know what to do? Do ...
April 3, 2012

ChemistryFor a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than the activation ...
March 1, 2012

ChemistryA + 2 B = C + D describes an elementary reaction, which takes place in a single step. Thus, the rate law must be a) rate = k (A)^2 b) rate = k (B)^2 c) rate = k (A) (B) d) rate = k (A) (B)^2 I think its D because there are 2 moles of B and 1 mole of A. Do you agree with my ...
February 24, 2012

ChemistryThe decomposition of hydrogen peroxide in solution and in the presence of iodide ion was studied in laboratory, and the following mechanism proposed based on the experimental data. H2O2 + I - = H2O + IO - (slow) H2O2 + IO - = H2O + O2 + I - (fast) Which one of the following ...
February 24, 2012

ChemistrySo based of the rule of thumb, its going to be 5 times faster. Also how can I use Arrhenius equation without the rate constant (k)?
February 23, 2012

ChemistryA particular reaction has an activation energy of 51.6 kJ/mol-rxn. How much faster is the reaction at 50 oC versus 25 oC? a. 2 times b. 5 times c. 3 times d. half as fast d. 20% as fast I think it would be A??
February 23, 2012

financeIf you put up $40,000 today in exchange for a 6.25 percent, 15-year annuity, what will the annual cash flow be?
April 15, 2010

ChemistrypH = -log(concentration) pH of HClO4= -log(5.8x 10^-2 M) use a calculator and figure it out do the same for the second.
March 21, 2010

chemistryOkay first lets figure out the equation P+H2---->PH3 balance it now we have: 2P + 3H2 --->2PH3 equation is now balanced. let us now find the reactant in excess 2 moles of P= 3 moles of H2 2(31)g of P = 3(2)g of H2 6.2 g of P= x x= 6.2x6/62= 0.6 g of H2 4 grams of H2 are ...
March 21, 2010

MathWait I think I got it The equation can be written as x-4x^-2 so d/dx(x)=1 and d/dx(-4x^-2)= -2(-4)(x^-2-1) which is 8x^-3 d/dx(x-4/x^2)= 1+8x^-3 correct?
March 21, 2010

MathWhat is the derivative of x - 4/x square. Just the denominator is squared.
March 21, 2010

optimizationSuppose you are a fill-dirt contractor and you have been hired to transport 400 yd3 of material across a large river. To transport the material, a container must be constructed. The following cost data are available: Each round trip costs $4.20 and material costs for the ...
October 3, 2009